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    miner's productivity and wages

    Hi, I have been asked questions about the pay of medieval miners, and how much rock or minerals they had to extract per day. Should anyone know of any possible references, we should be very grateful indeed.   Thanks,     D. Send.
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    Norman Baron 'Henry de Ferrers'

    Hi, Has anyone got access to source information, concerning the medieval Norman Baron 'Henry de Ferrers' or his descendants working Derbyshire mines? Apparently he held leases to exploit lead mines, and minted silver coins... according to websites. But the sites don't specifically quote their...